Disclosed are a hybrid populous lasiocarpa and a planting method thereof. The hybrid populous lasiocarpa is obtained by hybridizing and breeding Chinese white poplar and European red poplar and named as environmental-protection Chinese populous lasiocarpa. The planting method comprises the steps of seedling, cottage, transplanting in forest establishment regions, maintenance and forest establishment. The e environmental-protection Chinese populous lasiocarpa has a timber cycle of 3-6 years and has the advantages of being hermaphrodite, flowerless, seedless, saline-alkaline-resistant, wind-resistant, disease-resistant, pest-resistant, wide in application range, rapid in growth, harmless to air and soil, high in timber yield and the like, thereby being capable of serving as environmental greening, city and road border tree or windbreak as well as economic tree for large-area mountains or hills. The good environmental effects, the high timber yield, the good material quality and the comprehensively-applicable economic value can generate high social and economic benefits.